I think we should also consider Ventress. She loves power. Who has more darkside power-Reven or Grievous? She would want to join Reven. Malak would fight her, and it doesn't matter who wins. It just helps G0-T0 by getting rid of one more enemy, and always hurts Grievous. Either Ventress slays Malak, and join Reven, or Malak kills Ventress, and nothing changes for Reven.
If anyone even brings up this
I have three things to say.
1.Explosives destroy them.
2.There are at the most 24 ever recorded.
3. G0-T0 and Reven could defeat them, with EXPLOSIVES!!!!!
EDIT: Wow, I posted a lot. And I'm not even near being done.